Can't add the library to Meteor@1.5

[ArnieGA]

meteor add practicalmeteor:mocha fails

error line:
C:\Users\ my user \AppData\Local.meteor\packages\meteor-tool\1.5.0\mt-os.windows.x86_32\dev_bundle\lib\node_modules\meteor-promise\promise_server.js:218

error:
Error: No metadata files found for isopack at: /C/Users/my user/AppData/Local/.meteor/packages/coffeescript/1.0.17
at [object Object]..extend.loadUnibuildsFromPath (C:\tools\isobuild\isopack.js:901:13)
at C:\tools\packaging\tropohouse.js:521:21
at Array.forEach (native)
at Function..each..forEach (C:\Users\my user\AppData\Local.meteor\packages\meteor-tool\1.5.0\mt-os.windows.x86_32\dev_bundle\lib\node_modules\underscore\underscore.js:79:11)
at C:\tools\packaging\tropohouse.js:520:13
at C:\tools\utils\buildmessage.js:359:18
at [object Object]..extend.withValue (C:\tools\utils\fiber-helpers.js:89:14)
at C:\tools\utils\buildmessage.js:352:34_

P.S.: This is a completely new project created via meteor create, but current projects tests are also failing...apparently caused by fibers.

EDIT:
Uninstalled Meteor, cleaned the registry, restarted the computer, re-checked registry (clean), re-installed Meteor. Still fails.